-//===- ARM.td - Describe the ARM Target Machine -----------------*- C++ -*-===//
+//===-- ARM.td - Describe the ARM Target Machine -----------*- tablegen -*-===//
//
// The LLVM Compiler Infrastructure
//
include "llvm/Target/Target.td"
+//===----------------------------------------------------------------------===//
+// ARM Subtarget state.
+//
+
+def ModeThumb : SubtargetFeature<"thumb-mode", "InThumbMode", "true",
+ "Thumb mode">;
+
//===----------------------------------------------------------------------===//
// ARM Subtarget features.
//
-def ArchV4T : SubtargetFeature<"v4t", "ARMArchVersion", "V4T",
- "ARM v4T">;
-def ArchV5T : SubtargetFeature<"v5t", "ARMArchVersion", "V5T",
- "ARM v5T">;
-def ArchV5TE : SubtargetFeature<"v5te", "ARMArchVersion", "V5TE",
- "ARM v5TE, v5TEj, v5TExp">;
-def ArchV6 : SubtargetFeature<"v6", "ARMArchVersion", "V6",
- "ARM v6">;
-def ArchV6T2 : SubtargetFeature<"v6t2", "ARMArchVersion", "V6T2",
- "ARM v6t2">;
-def ArchV7A : SubtargetFeature<"v7a", "ARMArchVersion", "V7A",
- "ARM v7A">;
-def FeatureVFP2 : SubtargetFeature<"vfp2", "ARMFPUType", "VFPv2",
+def FeatureVFP2 : SubtargetFeature<"vfp2", "HasVFPv2", "true",
"Enable VFP2 instructions">;
-def FeatureVFP3 : SubtargetFeature<"vfp3", "ARMFPUType", "VFPv3",
- "Enable VFP3 instructions">;
-def FeatureNEON : SubtargetFeature<"neon", "ARMFPUType", "NEON",
- "Enable NEON instructions">;
-def FeatureThumb2 : SubtargetFeature<"thumb2", "ThumbMode", "Thumb2",
+def FeatureVFP3 : SubtargetFeature<"vfp3", "HasVFPv3", "true",
+ "Enable VFP3 instructions",
+ [FeatureVFP2]>;
+def FeatureVFP4 : SubtargetFeature<"vfp4", "HasVFPv4", "true",
+ "Enable VFP4 instructions",
+ [FeatureVFP3]>;
+def FeatureNEON : SubtargetFeature<"neon", "HasNEON", "true",
+ "Enable NEON instructions",
+ [FeatureVFP3]>;
+def FeatureNEONVFP4 : SubtargetFeature<"neon-vfpv4", "HasNEONVFPv4", "true",
+ "Enable NEON-VFP4 instructions",
+ [FeatureVFP4, FeatureNEON]>;
+def FeatureThumb2 : SubtargetFeature<"thumb2", "HasThumb2", "true",
"Enable Thumb2 instructions">;
+def FeatureNoARM : SubtargetFeature<"noarm", "NoARM", "true",
+ "Does not support ARM mode execution">;
def FeatureFP16 : SubtargetFeature<"fp16", "HasFP16", "true",
"Enable half-precision floating point">;
+def FeatureD16 : SubtargetFeature<"d16", "HasD16", "true",
+ "Restrict VFP3 to 16 double registers">;
+def FeatureHWDiv : SubtargetFeature<"hwdiv", "HasHardwareDivide", "true",
+ "Enable divide instructions">;
+def FeatureT2XtPk : SubtargetFeature<"t2xtpk", "HasT2ExtractPack", "true",
+ "Enable Thumb2 extract and pack instructions">;
+def FeatureDB : SubtargetFeature<"db", "HasDataBarrier", "true",
+ "Has data barrier (dmb / dsb) instructions">;
+def FeatureSlowFPBrcc : SubtargetFeature<"slow-fp-brcc", "SlowFPBrcc", "true",
+ "FP compare + branch is slow">;
+def FeatureVFPOnlySP : SubtargetFeature<"fp-only-sp", "FPOnlySP", "true",
+ "Floating point unit supports single precision only">;
-// Some processors have multiply-accumulate instructions that don't
-// play nicely with other VFP instructions, and it's generally better
+// Some processors have FP multiply-accumulate instructions that don't
+// play nicely with other VFP / NEON instructions, and it's generally better
// to just not use them.
-// FIXME: Currently, this is only flagged for Cortex-A8. It may be true for
-// others as well. We should do more benchmarking and confirm one way or
-// the other.
-def FeatureHasSlowVMLx : SubtargetFeature<"vmlx", "SlowVMLx", "true",
- "Disable VFP MAC instructions">;
+def FeatureHasSlowFPVMLx : SubtargetFeature<"slowfpvmlx", "SlowFPVMLx", "true",
+ "Disable VFP / NEON MAC instructions">;
+
+// Cortex-A8 / A9 Advanced SIMD has multiplier accumulator forwarding.
+def FeatureVMLxForwarding : SubtargetFeature<"vmlx-forwarding",
+ "HasVMLxForwarding", "true",
+ "Has multiplier accumulator forwarding">;
+
// Some processors benefit from using NEON instructions for scalar
// single-precision FP operations.
def FeatureNEONForFP : SubtargetFeature<"neonfp", "UseNEONForSinglePrecisionFP",
"true",
"Use NEON for single precision FP">;
+// Disable 32-bit to 16-bit narrowing for experimentation.
+def FeaturePref32BitThumb : SubtargetFeature<"32bit", "Pref32BitThumb", "true",
+ "Prefer 32-bit Thumb instrs">;
+
+/// Some instructions update CPSR partially, which can add false dependency for
+/// out-of-order implementation, e.g. Cortex-A9, unless each individual bit is
+/// mapped to a separate physical register. Avoid partial CPSR update for these
+/// processors.
+def FeatureAvoidPartialCPSR : SubtargetFeature<"avoid-partial-cpsr",
+ "AvoidCPSRPartialUpdate", "true",
+ "Avoid CPSR partial update for OOO execution">;
+
+/// Some M architectures don't have the DSP extension (v7E-M vs. v7M)
+def FeatureDSPThumb2 : SubtargetFeature<"t2dsp", "Thumb2DSP", "true",
+ "Supports v7 DSP instructions in Thumb2">;
+
+// Multiprocessing extension.
+def FeatureMP : SubtargetFeature<"mp", "HasMPExtension", "true",
+ "Supports Multiprocessing extension">;
+
+// M-series ISA?
+def FeatureMClass : SubtargetFeature<"mclass", "IsMClass", "true",
+ "Is microcontroller profile ('M' series)">;
+
+// ARM ISAs.
+def HasV4TOps : SubtargetFeature<"v4t", "HasV4TOps", "true",
+ "Support ARM v4T instructions">;
+def HasV5TOps : SubtargetFeature<"v5t", "HasV5TOps", "true",
+ "Support ARM v5T instructions",
+ [HasV4TOps]>;
+def HasV5TEOps : SubtargetFeature<"v5te", "HasV5TEOps", "true",
+ "Support ARM v5TE, v5TEj, and v5TExp instructions",
+ [HasV5TOps]>;
+def HasV6Ops : SubtargetFeature<"v6", "HasV6Ops", "true",
+ "Support ARM v6 instructions",
+ [HasV5TEOps]>;
+def HasV6T2Ops : SubtargetFeature<"v6t2", "HasV6T2Ops", "true",
+ "Support ARM v6t2 instructions",
+ [HasV6Ops, FeatureThumb2]>;
+def HasV7Ops : SubtargetFeature<"v7", "HasV7Ops", "true",
+ "Support ARM v7 instructions",
+ [HasV6T2Ops]>;
//===----------------------------------------------------------------------===//
// ARM Processors supported.
include "ARMSchedule.td"
+// ARM processor families.
+def ProcA8 : SubtargetFeature<"a8", "ARMProcFamily", "CortexA8",
+ "Cortex-A8 ARM processors",
+ [FeatureSlowFPBrcc, FeatureNEONForFP,
+ FeatureHasSlowFPVMLx, FeatureVMLxForwarding,
+ FeatureT2XtPk]>;
+def ProcA9 : SubtargetFeature<"a9", "ARMProcFamily", "CortexA9",
+ "Cortex-A9 ARM processors",
+ [FeatureVMLxForwarding,
+ FeatureT2XtPk, FeatureFP16,
+ FeatureAvoidPartialCPSR]>;
+
class ProcNoItin<string Name, list<SubtargetFeature> Features>
: Processor<Name, GenericItineraries, Features>;
def : ProcNoItin<"strongarm1110", []>;
// V4T Processors.
-def : ProcNoItin<"arm7tdmi", [ArchV4T]>;
-def : ProcNoItin<"arm7tdmi-s", [ArchV4T]>;
-def : ProcNoItin<"arm710t", [ArchV4T]>;
-def : ProcNoItin<"arm720t", [ArchV4T]>;
-def : ProcNoItin<"arm9", [ArchV4T]>;
-def : ProcNoItin<"arm9tdmi", [ArchV4T]>;
-def : ProcNoItin<"arm920", [ArchV4T]>;
-def : ProcNoItin<"arm920t", [ArchV4T]>;
-def : ProcNoItin<"arm922t", [ArchV4T]>;
-def : ProcNoItin<"arm940t", [ArchV4T]>;
-def : ProcNoItin<"ep9312", [ArchV4T]>;
+def : ProcNoItin<"arm7tdmi", [HasV4TOps]>;
+def : ProcNoItin<"arm7tdmi-s", [HasV4TOps]>;
+def : ProcNoItin<"arm710t", [HasV4TOps]>;
+def : ProcNoItin<"arm720t", [HasV4TOps]>;
+def : ProcNoItin<"arm9", [HasV4TOps]>;
+def : ProcNoItin<"arm9tdmi", [HasV4TOps]>;
+def : ProcNoItin<"arm920", [HasV4TOps]>;
+def : ProcNoItin<"arm920t", [HasV4TOps]>;
+def : ProcNoItin<"arm922t", [HasV4TOps]>;
+def : ProcNoItin<"arm940t", [HasV4TOps]>;
+def : ProcNoItin<"ep9312", [HasV4TOps]>;
// V5T Processors.
-def : ProcNoItin<"arm10tdmi", [ArchV5T]>;
-def : ProcNoItin<"arm1020t", [ArchV5T]>;
+def : ProcNoItin<"arm10tdmi", [HasV5TOps]>;
+def : ProcNoItin<"arm1020t", [HasV5TOps]>;
// V5TE Processors.
-def : ProcNoItin<"arm9e", [ArchV5TE]>;
-def : ProcNoItin<"arm926ej-s", [ArchV5TE]>;
-def : ProcNoItin<"arm946e-s", [ArchV5TE]>;
-def : ProcNoItin<"arm966e-s", [ArchV5TE]>;
-def : ProcNoItin<"arm968e-s", [ArchV5TE]>;
-def : ProcNoItin<"arm10e", [ArchV5TE]>;
-def : ProcNoItin<"arm1020e", [ArchV5TE]>;
-def : ProcNoItin<"arm1022e", [ArchV5TE]>;
-def : ProcNoItin<"xscale", [ArchV5TE]>;
-def : ProcNoItin<"iwmmxt", [ArchV5TE]>;
+def : ProcNoItin<"arm9e", [HasV5TEOps]>;
+def : ProcNoItin<"arm926ej-s", [HasV5TEOps]>;
+def : ProcNoItin<"arm946e-s", [HasV5TEOps]>;
+def : ProcNoItin<"arm966e-s", [HasV5TEOps]>;
+def : ProcNoItin<"arm968e-s", [HasV5TEOps]>;
+def : ProcNoItin<"arm10e", [HasV5TEOps]>;
+def : ProcNoItin<"arm1020e", [HasV5TEOps]>;
+def : ProcNoItin<"arm1022e", [HasV5TEOps]>;
+def : ProcNoItin<"xscale", [HasV5TEOps]>;
+def : ProcNoItin<"iwmmxt", [HasV5TEOps]>;
// V6 Processors.
-def : Processor<"arm1136j-s", ARMV6Itineraries, [ArchV6]>;
-def : Processor<"arm1136jf-s", ARMV6Itineraries, [ArchV6, FeatureVFP2]>;
-def : Processor<"arm1176jz-s", ARMV6Itineraries, [ArchV6]>;
-def : Processor<"arm1176jzf-s", ARMV6Itineraries, [ArchV6, FeatureVFP2]>;
-def : Processor<"mpcorenovfp", ARMV6Itineraries, [ArchV6]>;
-def : Processor<"mpcore", ARMV6Itineraries, [ArchV6, FeatureVFP2]>;
+def : Processor<"arm1136j-s", ARMV6Itineraries, [HasV6Ops]>;
+def : Processor<"arm1136jf-s", ARMV6Itineraries, [HasV6Ops, FeatureVFP2,
+ FeatureHasSlowFPVMLx]>;
+def : Processor<"arm1176jz-s", ARMV6Itineraries, [HasV6Ops]>;
+def : Processor<"arm1176jzf-s", ARMV6Itineraries, [HasV6Ops, FeatureVFP2,
+ FeatureHasSlowFPVMLx]>;
+def : Processor<"mpcorenovfp", ARMV6Itineraries, [HasV6Ops]>;
+def : Processor<"mpcore", ARMV6Itineraries, [HasV6Ops, FeatureVFP2,
+ FeatureHasSlowFPVMLx]>;
+
+// V6M Processors.
+def : Processor<"cortex-m0", ARMV6Itineraries, [HasV6Ops, FeatureNoARM,
+ FeatureDB, FeatureMClass]>;
// V6T2 Processors.
-def : Processor<"arm1156t2-s", ARMV6Itineraries,
- [ArchV6T2, FeatureThumb2]>;
-def : Processor<"arm1156t2f-s", ARMV6Itineraries,
- [ArchV6T2, FeatureThumb2, FeatureVFP2]>;
+def : Processor<"arm1156t2-s", ARMV6Itineraries, [HasV6T2Ops,
+ FeatureDSPThumb2]>;
+def : Processor<"arm1156t2f-s", ARMV6Itineraries, [HasV6T2Ops, FeatureVFP2,
+ FeatureHasSlowFPVMLx,
+ FeatureDSPThumb2]>;
-// V7 Processors.
+// V7a Processors.
def : Processor<"cortex-a8", CortexA8Itineraries,
- [ArchV7A, FeatureThumb2, FeatureNEON, FeatureHasSlowVMLx,
- FeatureNEONForFP]>;
-def : ProcNoItin<"cortex-a9", [ArchV7A, FeatureThumb2, FeatureNEON]>;
+ [ProcA8, HasV7Ops, FeatureNEON, FeatureDB,
+ FeatureDSPThumb2]>;
+def : Processor<"cortex-a9", CortexA9Itineraries,
+ [ProcA9, HasV7Ops, FeatureNEON, FeatureDB,
+ FeatureDSPThumb2]>;
+def : Processor<"cortex-a9-mp", CortexA9Itineraries,
+ [ProcA9, HasV7Ops, FeatureNEON, FeatureDB,
+ FeatureDSPThumb2, FeatureMP]>;
+
+// V7M Processors.
+def : ProcNoItin<"cortex-m3", [HasV7Ops,
+ FeatureThumb2, FeatureNoARM, FeatureDB,
+ FeatureHWDiv, FeatureMClass]>;
+
+// V7EM Processors.
+def : ProcNoItin<"cortex-m4", [HasV7Ops,
+ FeatureThumb2, FeatureNoARM, FeatureDB,
+ FeatureHWDiv, FeatureDSPThumb2,
+ FeatureT2XtPk, FeatureVFP2,
+ FeatureVFPOnlySP, FeatureMClass]>;
//===----------------------------------------------------------------------===//
// Register File Description
include "ARMInstrInfo.td"
-def ARMInstrInfo : InstrInfo {
- // Define how we want to layout our target-specific information field.
- let TSFlagsFields = ["AddrModeBits",
- "SizeFlag",
- "IndexModeBits",
- "Form",
- "isUnaryDataProc",
- "canXformTo16Bit",
- "Dom"];
- let TSFlagsShifts = [0,
- 4,
- 7,
- 9,
- 15,
- 16,
- 17];
+def ARMInstrInfo : InstrInfo;
+
+
+//===----------------------------------------------------------------------===//
+// Assembly printer
+//===----------------------------------------------------------------------===//
+// ARM Uses the MC printer for asm output, so make sure the TableGen
+// AsmWriter bits get associated with the correct class.
+def ARMAsmWriter : AsmWriter {
+ string AsmWriterClassName = "InstPrinter";
+ bit isMCAsmWriter = 1;
}
//===----------------------------------------------------------------------===//
def ARM : Target {
// Pull in Instruction Info:
let InstructionSet = ARMInstrInfo;
+
+ let AssemblyWriters = [ARMAsmWriter];
}
projects / oota-llvm.git / blobdiff